Identification of planetary wave patterns associated with ice seasonal sublimation/condensation dynamics in the polar regions of mars,based on IR mapping spectrometer OMEGA onboard <Emphasis Type="Italic">Mars Express</Emphasis> |
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Authors: | A V Rodin N A Evdokimova R O Kuzmin A A Fedorova O I Korablev J -P Bibring |
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Institution: | 1.Moscow Institute of Physics and Technology (State University),Dolgoprudny, Moscow Region,Russia;2.Space Research Institute,Russian Academy of Sciences,Moscow,Russia;3.Vernadsky Institute for Geochemistry and Analytical Chemistry,Russian Academy of Sciences,Moscow,Russia;4.Institut d’Astrophysique Spatiale,Orsay,France |
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Abstract: | Channel C of the orbital hyperspectrometer OMEGA onboard Mars Express spacecraft has delivered data on the distribution and seasonal variability of water ice spectral features at 1.25, 1.5, 2.0
μm, based on which one may conclude about the thickness of ice coverage and microstructure of the upper, optically active
ice layer on the Martian surface. Data covering polar regions during spring-to-summer periods of both hemispheres have been
analyzed. Microstructure of the North polar cap, as well as the residual frost deposits of the seasonal South polar cap, have
revealed remarkable zonal variations with regularly located maxima. Based on the comparison with the atmospheric general circulation
model results, it has been proposed that these variations result from the impact of mesoscale inertial waves in the circumpolar
vortex on water exchange processes between the atmosphere and planetary surface. |
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